H-beam drilling apparatus and drilling method

Abstract

The present invention relates to a drilling device for H-beam processing, capable of precisely fixing an H-beam and performing drilling operations under various conditions. Furthermore, it corrects errors through a feed structure and includes functions for storing processing conditions and managing history, thereby improving the precision and productivity of repetitive operations.

Description

Technology Field

[0001] The present invention is a technical field related to an H-beam drilling device for performing precise drilling on the flange or web surface of an H-beam used in building structures, etc. Background Technology

[0002] H-beams are widely used as primary structural materials in various fields, including construction, bridges, and industrial facilities, and high precision is required during the fabrication process to ensure strength and durability. In particular, numerous bolt holes are necessary to form foundation structures by connecting H-beams vertically and horizontally; drilling operations for this purpose must be performed on multiple surfaces, such as the upper and lower flanges and the web sides. Traditionally, the general method involved fixing each H-beam individually to a work table and manually positioning and adjusting tools to drill one by one. However, this manual method suffers from low productivity and potential quality variations due to repetitive alignment, time required for tool changes, and dependence on operator skill. Consequently, it reduces process efficiency and leads to increased unit costs. Furthermore, due to the complex cross-sectional structure of H-beams, operators must manually rotate or reposition the H-beams to machine the upper and lower flanges and the web surfaces separately. This process introduces tolerances in the positions of multiple bolt holes, making precise drilling impossible. Prior art literature

[0003] Republic of Korea Registered Patent No. 10-2197129 The problem to be solved

[0004] In order to solve the aforementioned problems, the present invention aims to provide an H-beam drilling device capable of performing robust drilling by placing a clamp capable of fixing an H-beam on one side of the frame of the drilling device, thereby protecting against reaction forces and vibrations caused by drilling.

[0005] Furthermore, we aim to provide a drilling device that can reduce the tolerance range by storing initial drilling conditions such as coordinates, rotational speed, and feed rate, and by recalling and repeatedly applying those conditions when machining H-beams of the same shape, thereby correcting the conditions if errors occur during operation.

[0006] In addition, we aim to provide an H-beam drilling device capable of comparison of the quality and conditions of identical products by accumulating and recording processing history, and enabling control through repetition. means of solving the problem

[0007] A drilling device for processing an H-beam according to the present invention may include a frame on which the H-beam is seated, a conveying unit for fixing or conveying the H-beam, a drilling unit for performing drilling on at least one of the flange surface and the web surface of the H-beam, and a clamp located on one side of the frame for fixing at least one of the flange surface and the web surface of the H-beam.

[0008] In addition, the drilling device may further include a processing condition storage module that stores drilling operation conditions and is applicable to H-beams of the same shape.

[0009] Furthermore, the processing condition storage module may further include a control unit that executes repetitive processing based on stored work conditions based on a reference coordinate and a position recognized by an external sensing sensor.

[0010] In addition, the control unit may further include a history management function for quality comparison and work execution for identical items by storing conditional quality data of the processed H-beam.

[0011] In addition, the control unit may include a correction unit that can correct the error or deviation to within a predetermined threshold range when an error or deviation exceeding a predetermined threshold occurs from a stored condition regarding the position or feed speed of the drilling unit, and performs a correction routine by storing the corrected history. Effects of the invention

[0012] The drilling device according to the present invention can stably fix an H-beam and perform drilling under precise position control, thereby improving machining precision and process efficiency.

[0013] Furthermore, by accumulating processing history for the same item, the type of H-beam can be detected to provide H-beams of uniform quality.

[0014] Furthermore, drilling operations can be performed regardless of work proficiency, which can save costs and time. Brief explanation of the drawing

[0015] FIG. 1 is a schematic diagram of an H-beam drilling device according to the present invention. FIG. 2 is a schematic diagram of an H-beam drilling device according to the present invention. FIG. 3 is a flowchart showing the process of an H-beam drilling device according to the present invention in sequence. Specific details for implementing the invention

[0016] Specific details regarding the problem to be solved, the means for solving the problem, and the effects of the invention as described above are included in the embodiments and drawings to be described below. The advantages and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described in detail below in conjunction with the accompanying drawings.

[0017] To solve the above-mentioned problem, the H-beam drilling device according to the present invention may include a frame on which an H-beam is seated, a conveying unit for fixing or conveying the H-beam, a drilling unit for performing drilling on at least one of the flange surface and the web surface of the H-beam, and a clamp located on one side of the frame for fixing at least one of the flange surface and the web surface of the H-beam.

[0018] Specifically, the device includes a frame on which the H-beam is seated to enable precise drilling operations on structural steel sections, such as H-beams used in the fabrication of architectural structures. The frame is installed at the bottom of the device and forms a support structure that allows the H-beam to be seated in an aligned state and placed horizontally and stably. For example, it may include a U-shaped or flat mounting structure composed of a steel or aluminum support structure capable of supporting one side or end of the H-beam's flange, and may include fixed bottom surfaces arranged at regular intervals. When the H-beam is seated on the frame, a clamp installed on one side of the frame can press and secure the one side or end of the flange. It is preferable that the frame be made of a material with sufficient rigidity to minimize vibration or twisting during the drilling operation.

[0019] Meanwhile, the H-beam drilling device according to the present invention may further include a processing condition storage module capable of storing processing conditions set during the processing operation of the drilling unit. For example, the processing conditions of the drilling unit may include the drilling start position, the number of rotations of the drill, the feed rate, and the number of holes, and by storing the above conditions, repetitive processing can be performed automatically without separate settings when drilling the same product.

[0020] As an example, the above processing condition storage module can store condition data such as drilling start position coordinates (X, Y, Z), drill rotation speed (RPM), feed rate (mm / min), hole spacing, and total number of holes entered by the operator in an internal memory or external storage device, and can be configured to repeat processing under the same stored conditions when an H-beam with the same conditions is input.

[0021] As a specific example, in a process of drilling a total of five holes at regular intervals in an H-beam flange measuring 300mm in width, 500mm in height, and 10mm in thickness, if the initial operator drills five holes at 100mm intervals starting from X=20mm and Y=30mm from the left corner, and sets the rotation speed to 800rpm and the feed rate to 100mm / min, all these conditions are saved with a filename such as HB-300x500-10T-hole5. Subsequently, when H-beams of the same specifications are repeatedly fed, the operator simply needs to recall the saved conditions, and the same task can be performed automatically without the need to input or remember the machining conditions every time. This reduces quality variations due to operator skill level, saves working time during repetitive production, and enables the production of high-quality H-beams, thereby maximizing process efficiency.

[0022] Furthermore, the above processing condition storage module may further include a control unit.

[0023] This control unit can perform the function of controlling to repeatedly perform drilling operations on H-beams of the same shape by recalling previously stored work conditions based on reference coordinates and position information recognized from external sensing sensors (not shown).

[0024] Specifically, when the H-beam is placed on the frame of the device, a sensor (optical sensor or proximity sensor) that detects the up, down, left, and right positions based on the reference coordinates of the mounting position (e.g., the bottom left corner) recognizes the actual installation position of the H-beam, and the control unit corrects the position of the drill unit by aligning it with the coordinate information stored in the processing condition storage module based on the recognized information, and performs drilling according to the predetermined conditions. To this end, the drill unit may include an XYZ axis transfer rail unit.

[0025] In addition, the external sensing sensor may include a side sensing sensor that detects the left and right side positions when the H-beam is seated on the frame, a front sensing sensor that recognizes the degree of advance in the longitudinal direction, and a height sensing sensor that can measure the height of the upper surface, each of which is fixedly installed on the side wall, front, and top of the frame to collect data for setting reference coordinates and correcting the processing position of the drill unit.

[0026] For example, if the reference coordinate is based on the bottom-left corner, a side detection sensor for left-right alignment installed on the left or right wall of the frame on which the H-beam is seated can detect the side reference position of the H-beam to detect the processing start position and the left-right alignment error. In this case, there are no specific restrictions on the type of sensor, as long as it is a sensor capable of detecting position, such as a proximity sensor, an optical sensor, or a laser distance sensor.

[0027] As another example, if the reference coordinate is based on the bottom-left corner, a vertical position correction height sensor located near the upper drill unit of the frame on which the H-beam is seated, or on the top of the frame, measures the height of the upper surface including the thickness deviation of the H-beam, thereby correcting and moving the height of the drill unit. In this case, the sensor is not significantly limited as long as it is a sensor capable of detecting position and measuring thickness, such as a laser distance sensor or a contact sensor.

[0028] As another example, if the reference coordinate is based on the bottom-left corner, the longitudinal alignment status of the H-beam can be detected at the front of the frame facing the front of the H-beam or at the leading edge relative to the transport direction, and it can be verified whether the H-beam has entered the correct position. In this case, the sensor is not limited to any sensor capable of recognizing the transported position, such as a photosensor or an ultrasonic distance sensor.

[0029] As a specific example, when repeatedly machining H-beams of the same specifications (300×500×10T), if an external sensor detects that the actual installation location of the H-beam differs from the previous conditions by 3mm, the control unit corrects the error to automatically adjust the drilling start position, and applies the rotational speed, feed rate, etc., as stored conditions to automatically execute machining of the same quality. In this way, even if a minor error occurs in the installation location of the H-beam, the device can align or apply conditions without separate operation by the operator, thereby ensuring efficiency, precision, and consistency in repetitive work.

[0030] As described above, in order to correct the position, the control unit may be configured to detect the reference coordinates of the mounting position after the workpiece H-beam is placed on the frame and compare them with the stored processing conditions to finely correct the position or speed of the drilling unit.

[0031] In this regard, the method of correcting errors by moving the H-beam itself by means of a transfer unit may result in structural problems, such as vibration occurring during the transfer process or damage to support rollers or fixed clamps, when the H-beam is a heavy structure. Therefore, the error can be corrected by moving only the drill unit through an X, Y, and Z-axis transfer structure in which the drilling unit is installed, while the H-beam remains fixed on the frame by means of a clamp. To move only the drill unit, the drill unit may be supported so as to be independently movable in the up-down, left-right, and front-back directions by a multi-axis transfer unit (not shown) fixedly installed on the frame. For example, the transfer unit may be structured to be transferable along each axis by including ball screws, linear rails, and servo motors installed in each direction, and the control unit can precisely correct the error by moving the drill unit through precise control of the servo motor of the corresponding axis according to the detected error value.

[0032] For example, the X-axis can move the drill unit left and right to induce alignment of the H-beam web surface, the Y-axis can move the drill unit up and down to perform drilling on the upper and lower surfaces of the H-beam flange, and the Z-axis can move the drill unit in the forward and backward (depth) direction to advance the drill.

[0033] For example, if an error of 2mm occurs in the X-axis direction relative to the reference coordinate, the control unit moves the drill unit 2mm to the left through the X-axis ball screw so that the drilling is positioned in the correct position.

[0034] In addition, to prevent drilling path interference or correction failure that may occur when the travel distance is too large during the process of the drill unit correcting errors, a threshold value for the correctable distance can be preset, and the system can be configured to stop the operation and generate a signal to notify the operator if the threshold value is exceeded.

[0035] Furthermore, since there is a possibility that accumulated errors may occur due to the encoder or sensor of the drill unit during the repetitive calibration process, the device includes a function to reset the reference coordinate system by recognizing a fixed reference point (e.g., a position reference block or sensor station) within the device at regular intervals (e.g., 10 work units), thereby maintaining consistency of the entire coordinate system even during repetitive operations and preventing quality degradation due to the accumulation of errors.

[0036] Meanwhile, the above control unit may further include a history management unit.

[0037] The history management department is configured to collect, store, and analyze work performance records for each individual H-beam in a production environment where H-beams are processed repeatedly, thereby enabling the identification of quality deviations or the extraction of optimal conditions for H-beam production.

[0038] Specifically, the control unit can record conditional quality data information in real time, such as the quantity of processed H-beams, the total time or time per stage required for processing individual H-beams, conditional values ​​used for processing such as rotational speed (RPM), feed rate (mm / min), and drilling depth, and quality measurement values ​​such as post-processing hole diameter deviation and position error obtained through external sensors or quality inspection devices.

[0039] For example, when machining 50 H-beams of the same shape in succession, the history management unit records that the average processing time for each H-beam remained at 47 seconds until it increased to 60 seconds or more at a specific point in time, and can also store changes in rotational speed or any abnormalities in sensor measurements during that period. This data can be utilized to recommend the most stable conditions for machining the same item or to provide advance warnings to operators regarding potential quality changes due to equipment malfunctions or tool wear, thereby maximizing the efficiency of device usage. Furthermore, the stored records can be directly exposed to operators or managers in visually recognizable formats, such as graphs or reports, further maximizing management efficiency.

[0040] Furthermore, the above control unit may further include a correction unit through error detection.

[0041] The correction unit through error detection can be configured to detect in real time and correct when a preset threshold is exceeded from stored reference conditions regarding the drilling process, such as the position or feed rate of the drill unit, during a drilling operation, and then execute a reference routine.

[0042] Specifically, the control unit compares real-time control signals, such as the feed position coordinates (X, Y, Z) of the drill unit, the rotational speed and feed rate of the drill, with reference operating conditions, and if a deviation occurs, it can adjust the corresponding value by referring to records of high-quality products produced.

[0043] For example, if a position error of ±0.5 mm or greater or a feed rate deviation of ±50 mm / min or greater occurs, this is detected as an abnormal condition, and the corresponding value can be adjusted according to the correction unit. Correction can generally be performed using either a position correction or a speed correction method. The position correction method calculates the error between the drill unit's current coordinates and reference coordinates and realigns the unit to the reference position, while the speed correction method returns the rotational speed or feed rate to a reference value.

[0044] As a specific example, if the stored standard is 100 mm / min, and the movement speed of the drill unit increases to 120 mm / min during operation, it is determined that an error of ±20 mm / min has occurred compared to the stored standard, and the routine by the correction unit immediately returns the speed to the standard value, and at the same time, a history such as "2025.06.30.11:32, X-axis speed correction -20 mm / mi" can be stored and analyzed.

[0045] The correction function of the correction unit through such error detection enables the maintenance of processing accuracy without interrupting the process, and by recognizing the presence or absence of equipment abnormalities in advance and responding to them beforehand, it is possible to maximize production efficiency and quality stability. Explanation of the symbols

[0046] 10 frames 20th Transfer Department 30 drilling units 40 clamps HH beam

Claims

Claim 1 A drilling device for processing an H-beam comprises: a frame on which the H-beam is seated; a transfer unit for fixing or transferring the H-beam; and a drilling unit for performing drilling on at least one of the flange surface and the web surface of the H-beam. and a clamp located on one side of the frame for fixing one or more of the flange surface and web surface of the H-beam; the drill unit includes an XYZ axis transfer rail unit; the drilling device includes a processing condition storage module that stores drilling work conditions and is applicable to H-beams of the same shape; the processing condition storage module further includes a control unit that executes repetitive processing based on the stored work conditions based on a reference coordinate and a position recognized by an external sensing sensor; the reference coordinate includes a sensor that detects the up, down, left, and right positions based on the reference coordinate of the mounting position when the H-beam is placed on the frame of the device, and the control unit corrects the position of the drill unit by aligning with the coordinate information stored in the processing condition storage module based on the recognized information, and includes a function to reset the reference coordinate system by recognizing a fixed reference point within the device at regular intervals during the repetitive correction process; the external sensing sensor includes a side sensing sensor that detects the left and right side positions when the H-beam is placed on the frame, a front sensing sensor that recognizes the degree of advance in the longitudinal direction, and the top surface height An H-beam drilling device comprising a height sensing sensor capable of measuring, each fixedly installed on the side wall, front and top of the frame to collect data for setting reference coordinates and correcting the processing position of the drill unit. Claim 2 delete Claim 3 delete Claim 4 An H-beam drilling device according to claim 1, wherein the control unit further includes a history management function for quality comparison and work execution for identical items by storing conditional quality data of the processed H-beam. Claim 5 An H-beam drilling device according to claim 4, wherein the control unit includes a correction unit capable of correcting the error or deviation to within a predetermined threshold range when an error or deviation exceeding a predetermined threshold occurs from a stored condition regarding the position or feed speed of the drilling unit, and storing the corrected history to perform a correction routine.

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